2013 Semester 1 - 期中考 Midterm Exam 考古題

準備期中考了... 2013 學年第 1 學期的。感謝學長提供了去年 (2012) 的考古題支援我們，請點選下列檔案連結、打開閱讀：

Op Amp (積體電路應用) 2012 Semester 1 的期中考題目和解答 -

• kuas_ee_2012_s1_midterm_exam_answers_OpAmp.doc

EPQ (電力品質) 2012 Semester 1 的期中考題目和解答 (與今年考題極為相似) -

• kuas_ee_2012_s1_midterm_exam_answers_EPQ.doc

Math (高等工程數學) 2013 Semester 1 的期中考前老師指定練習的題庫 (共 24 題) 和同學們共同努力求得的解答集合 (今年老師從 24 題選出 7 題考試，是請碩士班學生來監考) -

• kuas_ee_2013_s1_midterm_exam_answers_math_jointworks.pdf

以上，加油啦。

捷運機電 - MRT Stray Current Corrosion Issues

Talked a little bit about the Stray Current Corrosion (雜散電流腐蝕) issues in the class this evening. See what we found and learned in addition from the Internet:

Stray current corrosion is a kind of electrolysis phenomena that usually occurs quietly in many places and threats the longevity and safety of metal constructions seriously.

TPC：結構物防蝕專論 - 雜散電流介紹, by 賀世中 - 

http://publish.tpc.gov.tw/Book/laborbook/no.30/a3011.pdf

• 捷運系統之雜散電流防制對策及監測結果探討 - by 顏坤鴻, 台北市政府捷運工程局第三處工程員

• Railway Stray Current Management - an engineering service provided by Intertek Group plc. (It has agents or representative offices in Taiwan, too.)

下課。

高等工程數學 - Differential Equation Solver

Free online Differential Equation Solver provided by WolframAlpha:



下課。

+ Limit Calculator:


+ Derivative Solver:


+ Function Graph Plotter:


+ Algebra Solver:

音樂賞析 - Into the Woods (musical)

For this week and the next, we are going to watch the video of the musical theater - Into the Woods. The version of video played in classroom can not be seen on YouTube in Taiwan, probably due to copyright restrictions.

Here, alternatively, let's enjoy Sondheim! (Stephen Sondheim, the music and lyrics composer of the musical Into the Woods) the Birthday Concert 2010 (age 80) played at Lincoln Center for the Performing Arts in New York City:

Pay range of a violinist in the band of a musical theater:

• Annual pay of a violinist for the Phantom of Opera played in New York City: USD70,000/year.

• Earned pay by Prof. Lin in a month of violin play for Into the Woods tour performance in the town where his college locates when he was studying there in the USA: USD8,000/month.

Good job?!

下課。

捷運機電 - Composition of the Train Disc Brake Pad

Prof. Lee questioned: What is the train's disc brake pad (disc brake lining) made of? Here are what we found on the Internet:

A train's straight air brake system diagram -
Attribution: Harpwolf at en.wikipedia.org

How does a modern train's disc brake look like? See the picture below:

Axle-mounted disc brakes on a train bogie -
Photo courtesy Eurail mag.

An example of disc brake lining compositions (semi-metallic types):

Selection of Best Formulation for Semi-Metallic Brake Friction Materials Development (experiments done for car brakes, pdf) - www.intechopen.com

As can see in the data, modern disc brake linings (a friction material) are made of composite material of partly ceramic, metallic, plastic, rubber and resin mixture. Meanwhile, the brake disc (or disc brake "rotor" in American English) is usually made of cast iron, cast steel, or carbon / ceramic composites according to the required braking performance (ref. Knorr-Bremse Brochure - Brake Discs and Pads for Railway Trains, a pdf document). The choice of the brake lining has to match the properties of the brake disc material in order to meet the maximum braking performance and longevity.

That's it.

下課。